For example, the entire admin back end can be civil service. (Some of it already is) and contracting needs to go die in a dumpster fire. You’ve got at least 30,000 infantrymen sitting around doing nothing on any given day. Take a survey of their skills and start assigning additional duties. You can always fall back on contractors if you run out of grunts.
Also, for the love of God stop maintaining an entire mechanized army. You don’t need to mount every soldier at the same time. Yes it’s awesome. But most infantry units aren’t going much of anywhere once they’re dug in.